Footnotes

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• Correction notice This paper has been amended since it was published Online First. The digital object identifiers were missing from some of the references. Also, we have removed the ‘accessed date’ for reference 11 because this was added by the publisher and was not the date accessed by the authors. The article states ‘In New South Wales, Australia none of 735 students and 128 staff contracted COVID-19 from nine child and nine adult initial school cases despite close contact.’ This paragraph has been rewritten to provide more clarity. The publisher has also updated references which cite preprints to make it clearer that these are preprints. In paragraph four, starting ‘In some regions…’ it should have been clearer that the data from Japan was also reported in a preprint.

• Contributors APSM and SNF both conceived the paper. APSM wrote the first draft of the manuscript, and SNF and APSM both edited and agreed on the final manuscript.

• Funding The salaries of APSM and SNF are funded in part by the NIHR Southampton Clinical Research Facility and NIHR Southampton Biomedical Research Centre.

• Competing interests None declared.

• Patient consent for publication Not required.

• Provenance and peer review Not commissioned; internally peer reviewed.